x, y ------ boki prostokąta tego mniejszego
x, 2y ----- boki dużego prostokata
2x + 2y = 76
x + y = 38
2x + 2 * 2y = 106
x + 2y = 53
x + y + y = 53
38 + y = 53
y = 53 - 38
y = 15
x + 15 = 38
x = 38 - 15
x = 23
P = x * (2y)
P = 23 * 2 * 15
P = 23 * 30
P = 690cm^2 ----------- odpwoiedź
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x, y ------ boki prostokąta tego mniejszego
x, 2y ----- boki dużego prostokata
2x + 2y = 76
x + y = 38
2x + 2 * 2y = 106
x + 2y = 53
x + y + y = 53
38 + y = 53
y = 53 - 38
y = 15
x + y = 38
x + 15 = 38
x = 38 - 15
x = 23
P = x * (2y)
P = 23 * 2 * 15
P = 23 * 30
P = 690cm^2 ----------- odpwoiedź